August 07, 2017

Chirp Management in Silicon-Graphene Electro Absorption Modulators

Asselbergs I.

Contestabile G.

D'Errico A.

Galli P.

Huyghebaerts C.

Midrio M.

Pantouvaki M.

Romagnoli M.

Sorianello V.

Van Campenhout J.

We study the frequency chirp properties of Graphene-on- Silicon electro-absorption modulators (EAMs). By experimentally measuring the chirp of a 100 um long single layer Graphene EAM, we show that the optoelectronic properties of Graphene induce a large positive linear chirp (up to 1.8 GHz) on the optical signal generated by the modulator. We exploit this peculiar feature for chromatic-dispersion compensation in fiber optic transmission thanks to the pulse temporal lensing effect. In particular, we show dispersion compensation in a 10Gb/s transmission experiment on standard single mode fiber with temporal focusing distance (0-dB optical-signal-to-noise ratio penalty) of 60 km, and also demonstrate 100 km transmission with a bit error rate largely lower than the conventional Reed-Solomon forward error correction threshold of 10-3.

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